Let ${\left( {2{x^2} + 3x + 4} \right)^{10}} = \sum\limits_{r = 0}^{20} {{a_r}{x^r}} $ Then ${{{a_7}} \over {{a_{13}}}}$ is equal to ______.

Question

Let ${\left( {2{x^2} + 3x + 4} \right)^{10}} = \sum\limits_{r = 0}^{20} {{a_r}{x^r}} $

Then ${{{a_7}} \over {{a_{13}}}}$ is equal to ______.

Correct Answer

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